Improvement in camera obscuras



G. RAPHAEL.

Camera-Obscura.

Patented Aug. 31,1875.

Innen For:

Witness@ 5 z /kja/Q N-PETEHS, FHDTD-LITRGGRLPHER. WASHINGTON, D C.

UNITED STATES' PATENT OFFICE.

GEORGE RAPHAEL, OF NEW YORK, AssIeNOR To THOMAS o. OLARK, OE

BROOKLYN, N. Y.

IMPROVEMENT IN CAMERA OBSCURAS.

`Specifieation forming part of Letters Patent No. 167,271, dated August 31, 1875; application filed July Q9, 1873.

which is encircled by a COQ-Wheel, into which a pinion on the end of a universal'joiuted rod engages, for the purpose oi' rotating the tube so as to adjust the prism horizontally, its vertical adjustment being eii'ected by axial setscrews, the whole being inelosed in a sectional dark chamber, which can be taken apart and moved from place to place with ease and rapidity, as I will further explain by reference to the drawing, in Which- Figure l is an elevation, Fig. 2 a vertical section, and Fig. 3 a plan, of my invention. Fig. 4 is a vertical section of prism, lens, tube, and adjusting mechanism 'on an enlarged scale; and Fig. 5, a top View of same, cap removed.

In the drawing, A indicates the prism or reflector, which is three-sided, one of its sides, B, being darkened by its framework or setting, and supported in the rotary tube C by set-screws D D, which also adjust the prism vertically. (See Fig. 5.) E is the ooncavoconvex or double lens, also adjustable longitudinally of tube, and set in the tube C. F is the toothed Wheel, encircling` the said tube. G is the pinion on the end of the universaljointed rod H, which rotates the tube, adjusting the prism horizontally. I is a table, supporting the paper or canvas which receives the picture, and K is the sectional dark chamber.

What I claim, and desire to secure by Letters Patent, is-

The prism A, lens E, tube O, Wheel F, pinion G, rod H, and sectional dark chamber K, all combinedfarranged, and operating' substantially as and for the purposes described.

GEORGE RAPHAEL.

Witnesses ARTHUR NEILL, CHARLES ZIMMERMAN. 

